新型纳米复合材料的膜效率研究  

Study on Membrane Efficiency of a New Nanocomposite

作　　者：屈沅治[1] 孙金声[1] 苏义脑[1] 

机构地区：[1]中国石油天然气集团公司钻井工程技术研究院,北京100097

出　　处：《石油钻探技术》2008年第2期32-35,共4页Petroleum Drilling Techniques

基　　金：中国石油天然气集团公司应用基础研究项目"纳米膜结构封堵型水基钻井液机理研究"(编号:03A20203);中国石油天然气股份有限公司科技创新基金项目"水基钻井液中新型纳米复合材料的研究"(编号:06051128)联合资助

摘　　要：新型纳米复合材料是一种纳米尺寸的蒙脱土片层分散在两亲性嵌段聚合物基体中形成的复合材料,既具有两亲性嵌段聚合物的优点,又融合纳米复合材料的长处,已被证实可用作水基钻井液抗高温降滤失剂。通过吸附等温线法测定了泥页岩岩心孔隙流体的水活度,采用渗透压差法评价了新型纳米复合材料的膜效率,结果表明,新型纳米复合材料与无机离子配合使用,能显著提高模拟液体系的膜效率,模拟液体系具有明显的半透膜效应,其膜效率高达75.7%,远大于其它无机盐模拟液体系的膜效率。探讨了该新型纳米复合材料提高模拟液膜效率的作用机理。A new nanocomposites, nano size montmorillonite dispersed in the arnphiphilic block poly met matrix, has the advantage of amphiphilic block polymers and nanocomposites and was verified as a high temperature fluid loss control additive in water-based drilling fluid, The water activity of pore fluid of shale cores was determined by the adsorption isotherm curve, and the membrane efficiency of the novel nanocomposite was evaluated by the osmotic pressure difference. The results indicated that the nanocom posite combined with inorganic ions could significantly enhance the membrane efficiency of the solution system. The simulated solution system has an obvious semi permeable membrane effect with membrane ef ficiency of 75.7% which is much higher that that of the other inorganic salt simulated solution system. In addition, the mechanism of improving the membrane efficiency after adding the novel nanocomposite was discussed.

关 键 词：纳米复合材料 膜效率 水活度 半渗透膜 钻井液 

分 类 号：TE254.4[石油与天然气工程—油气井工程]